bike starts easily on first or second kick with choke on and idles fine. but with the choke off it backfires/pops like a machine gun, very rapidly. first thing i did was pull the carb and very cleaned it meticulously. put it back together and same problem. next i double checked the hot start was not leaking/ was not stuck same problem. i next took the carb apart and replaced every jet. 48 pilot (should be too big, i normally ran a 45) 168 main stock needle stock leak jet. i still have the same problem.
im totaly out of ideas anyone have any input? bike is just rebuilt new valves/seats/piston running 110 octane sunoco race fuel. w/je 13.75 piston
note: bike behaves "normally" with choke on though still seems lean.
Edited by Cadoewen, April 01, 2012 - 12:50 PM.